I have both the Kiliminjaro Jacket and Pants too. I like them a lot, except I get tired of the snaps on the jacket. But this system keeps the water out, and it's warm too. You can remove the liner and open a bunch of vents and use the jacket into somewhat warmer temps, eighties maybe. An Aerostich suit is easier to put on but I hear it's not totally waterproof. Lots of people I know love the Stich though. I'll keep the First gear till it wears out.
Warren